UART and UARTE difference

RE: UART and UARTE difference

Simonr — Tue, 15 Mar 2022 08:54:26 GMT

Hi Eilon

You're correct, the EasyDMA consumes ~1.2mA, but there are some pros to using EasyDMA, like lower CPU usage, less current consumption if the CPU gets to sleep, and more CPU time available for other timing-critical tasks, so it generally pays off to use EasyDMA. If you have more questions, please create a new ticket, as this case is ~2 years old at this point.

Best regards,

Simon

RE: UART and UARTE difference

eilon — Mon, 14 Mar 2022 09:51:25 GMT

Hi @Simonr,
I looked at the linked you attached, and I didn't see anything about the power consumption differences between UART and UARTE.
From what I have read, using EasyDMA consume more power then the regular UART.

What am I missing?

- Eilon

RE: UART and UARTE difference

Simonr — Wed, 03 Jun 2020 08:39:01 GMT

Hi awneil

No, sorry if that wasn't clear. UARTE is Universal asynchronous receiver/transmitter (UART) with EasyDMA, so if you don't want DMA you will have to use the UART peripheral.

Best regards,

Simon

RE: UART and UARTE difference

awneil — Wed, 03 Jun 2020 07:52:27 GMT

So can you use UARTE, but not use the DMA ?

RE: UART and UARTE difference

Simonr — Wed, 03 Jun 2020 06:53:39 GMT

The difference between UART and UARTE is that UARTE uses EasyDMA. You can configure examples to use either UART or UARTE in your application, but for the nRF52 series there's no reason to use UART over UARTE, as UARTE is both faster, has lower CPU usage, and consumes less power. For more details on UARTE, UARTE, and EasyDMA, please check out the product specification that goes more in-depth into these features.

Best regards,

Simon